body > header > .mobile-navigation {
  display: none;
}

@media (max-width: 680px) {
  body > header {
    position: relative;
    z-index: 10;
  }

  body > header > nav {
    display: none;
  }

  body > header > .mobile-navigation {
    display: block;
    order: 1;
    padding: 0;
    border: 0;
  }

  .mobile-navigation > summary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 88px;
    min-height: 48px;
    padding: 10px 14px;
    border: 1px solid var(--ink);
    border-radius: 0;
    background: var(--paper);
    color: var(--ink);
    cursor: pointer;
    list-style: none;
    touch-action: manipulation;
  }

  .mobile-navigation > summary::-webkit-details-marker {
    display: none;
  }

  .mobile-navigation[open] > summary {
    background: var(--ink);
    color: var(--paper);
  }

  .mobile-navigation > nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 10px 6% 16px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 10px 20px #293b331a;
    max-height: 70vh;
    overflow-y: auto;
  }

  .mobile-navigation:not([open]) > nav {
    display: none;
  }

  .mobile-navigation > nav > a {
    display: block;
    min-height: 48px;
    padding: 14px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }
}